DE105942C - - Google Patents

Info

Publication number
DE105942C
DE105942C DENDAT105942D DE105942DA DE105942C DE 105942 C DE105942 C DE 105942C DE NDAT105942 D DENDAT105942 D DE NDAT105942D DE 105942D A DE105942D A DE 105942DA DE 105942 C DE105942 C DE 105942C
Authority
DE
Germany
Prior art keywords
mouthpiece
tube
speaking
telescopically
hose
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
DENDAT105942D
Other languages
German (de)
English (en)
Publication of DE105942C publication Critical patent/DE105942C/de
Active legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/02Constructional features of telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
DENDAT105942D Active DE105942C (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
DE105942C true DE105942C (enrdf_load_stackoverflow)

Family

ID=376169

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT105942D Active DE105942C (enrdf_load_stackoverflow)

Country Status (1)

Country Link
DE (1) DE105942C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003812A1 (en) * 1983-03-17 1984-09-27 Antoni Alberto Grigioni Variable aperture microphone

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003812A1 (en) * 1983-03-17 1984-09-27 Antoni Alberto Grigioni Variable aperture microphone
EP0134751A1 (fr) * 1983-03-17 1985-03-20 Antoni Alberto Grigioni Microphone à ouverture variable

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